Welcome to Firefox for Android Add-ons.
Add extra features and styles to make Firefox for Android your own.
CloseDeveloper reply by mthaens
Rated 1 out of 5 stars
Does not work for TB 52.7.0 (64-bit) LinuxMint, no button in "customize toolbar"
Tested. There is a button. Right click next to the main tabs.
To create your own collections, you must have a Mozilla Add-ons account.